You can't strongarm a truly random sample. Alas, hah. For some stuff you have to ask people to come on site, which tends to self select a bit. Sometimes you

You can't strongarm a truly random sample. Alas, hah. For some stuff you have to ask people to come on site, which tends to self select a bit. Sometimes you get... interesting folks. (Just talking generally about onsite user testing, not involved with G+ in any way)